[1] Univ Occupat & Environm Hlth, Kitakyushu, Fukuoka 807, Japan
[2] Tokyo Womens Med Univ, Inst Rheumatol, Tokyo, Japan
[3] Nagoya Univ, Grad Sch Med, Nagoya, Aichi 4648601, Japan
[4] Tokyo Med & Dent Univ, Tokyo, Japan
[5] Abbvie, Tokyo, Japan
[6] Keio Univ, Sch Med, Tokyo, Japan